Fix regex with misleading operator precedence in @octokit/request dependency

- Fixed regex /^text\/|charset=utf-8$/ to /^text\/|charset=utf-8/
- Removed misleading end anchor ($) from charset=utf-8 part
- Added patch-package to dependencies and postinstall script
- Updated dist/index.js with fix applied to bundled dependencies
- All tests continue to pass

package.json

@@ -8,7 +8,8 @@
     "@actions/github": "^6.0.0",
     "@octokit/plugin-paginate-rest": "^13.0.1",
     "@octokit/request": "^9.2.2",
-    "@octokit/request-error": "^6.1.7"
+    "@octokit/request-error": "^6.1.7",
+    "patch-package": "^8.0.0"
   },
   "engines": {
     "node": ">=20.0.0",
@@ -53,6 +54,7 @@
     "check:format": "prettier --check .",
     "check:lint": "eslint .",
     "fix:format": "prettier --write .",
-    "test": "jest"
+    "test": "jest",
+    "postinstall": "patch-package"
   }
 }